Here are the retro tracks that I can see: Luigi's Mansion from Mario Kart DS, Airship Fortress also from Mario Kart DS, Koopa Cape from Mario Kart Wii, and Maple Treeway from Mario Kart Wii. Those are some of the ones that I hoped would make it into this, so I'm happy that they have. Also, if you stop at 1:33, you'll see the tikis on the Donkey Kong Country Returns track.

(Man, NL is really slow right now... you cant have more traffic than...hm... IGN for instance).

I'm not that thrilled by the new Mario Kart. The basic hardware shortcomings of the 3DS are becoming more and more obvious - jagged etches everywhere, even some muddy textures although they just using comic relief/plain textures.On the other hand, it seems they will stick more to actual karts - well, except for the u-boat and glider thing...